Recent content by LilWee247

  1. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    I will check again to see what live data my reader will show. But you are talking about several things Idk how to do or even what tools to use to accomplish those tests.
  2. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    I was hoping to get some things to try before sending it to the shop. Definitely not opposed to sending to my favorite shop but they only get stuff from me if I can't figure it out. If it would just give me a code as a starting spot, I would probably have figured it out. I am pretty decent at...
  3. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    Don't have access to one. My code reader has some live data usage.
  4. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    I'm not sure that my code reader can see individual misfires. It did tell me a specific cylinder when I burned through a spark plug wire.
  5. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    My pressure has shown 62 ever since I put it together. Still shows 62
  6. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    I did both while having the gauge on the windshield so I could see changes. That all looked fine to me.
  7. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    So with the fuel pressure, I only checked at the valve before the intake. Could the regulator be dropping pressure after that point as to affect the injection?
  8. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    I don't hear or notice any different noises. Just runs like crap with some backfires and loss of power.
  9. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    Also this has no emissions. No egr or rear O2. Plus they are tuned out of the computer.
  10. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    Best I can tell, trims look fine
  11. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    Also this cap and rotor are only 2 yrs old with about 5000 miles worth of driving.
  12. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    So, it I take the the cap off, will there be obvious signs of this occurring?
  13. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    Could this happen even though I'm not getting any codes for misfires?
  14. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    Could it possibly be the timing chain stretched? If so, how can I verify without taking the timing cover off?
  15. L

    Vortec 5.7 stumbles and backfires without giving and check engine codes

    S10 with Vortec 5.7 from 1998 K2500. Truck has been running perfect for 2 years. Started it up one day and now it stumbles and backfires with low power. No check engine light or codes. Fuel pressure looks fine. New fuel. Put scan tool on and watched live data for O2 sensors and they appear fine...
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